Rohm and Haas Company

Donald Lee Zolotorofe

Scott S Han

Leonard Edward Bogan, Jr

Andrew Michael Lemonds

Anne Mae Gaffney

Mark A Silvano

Peter David Klugherz

Ruozhi Song

Michael Stanley DeCourcy

Michele Heffner

Daniel J Martenak

Robert Wilczynski

Elsie Mae Vickery

Fernando Antonio Pessoa Cavalcanti

I-Hwa Midey Chang-Mateu

Paul Benjamin Schladenhauffen

Eric Gustave Lundquist

Daniel Arthur Bors

Sanjay Chaturvedi

Muhunthan Sathiosatham

Manhua Lin

Abraham Benderly

Bradley Anson Jacobs

Minh N Ngo

Frederick William Kaiser

Nitin Chadda

Fernando A P Cavalcanti

Andrew M Lemonds

Jr Leonard Edward Bogan

Mark Anthony Silvano

Michele Doreen Heffner

A multistage process for the preparation of methacrylic acid and esters thereof via the hydrolysis of ACH, cracking the hydrolysis products, and converting the cracked products to the desired acid or ester, wherein the average temperature in the first hydrolysis reactor is from 55 C to 70 C.

Process for producing MMA and/or MAA from acetone cyanohydrin and sulfuric acid

A method for producing a mixture of ethylene and carbon monoxide by contacting ethane and an oxygen source at a temperature of at least 500&#xb0; C. to produce ethylene and carbon monoxide. A method for producing an alkyl propionate by steps of: (a) contacting ethane and an oxygen source at a temperature of at least 500&#xb0; C. to produce ethylene; (b) contacting an alcohol, ethylene and carbon monoxide with an ethylene carbonylation catalyst to produce the alkyl propionate; and (c) separating the alkyl propionate from byproducts and starting materials. The method further comprises condensing the alkyl propionate with formaldehyde to produce an alkyl methacrylate.

Processes for producing ethylene and carbon monoxide mixtures from ethane

The present invention relates to an improved process for the conversion of alkanes to unsaturated carboxylic acids.

Process for converting alkanes to unsaturated carboxylic acids

The present invention provides a method for minimizing the decomposition of cyanohydrins in exothermic chemical reactions involving cyanohydrins. The method comprises providing a reaction medium and reactants to a tubular reactor having internal mixing means, mixing the reaction medium and reactants to form a homogenous reaction mixture, removing heat from the reaction process and reacting the reactants to produce a mixed product having a bulk temperature. The method may further comprise cooling the reaction medium to a temperature from 1-10&#xb0; C. cooler than the bulk temperature of the mixed product prior to providing the reaction medium to the tubular reactor.

Process for chemical reactions involving cyanohydrins

A process for converting a salt of a hydroxycarboxylic acid to an unsaturated carboxylic acid, or esters thereof. The process involves converting an ammonium salt of a hydroxycarboxylic acid in aqueous solution to a corresponding hydroxycarboxylic acid and ammonium cation in aqueous solution; and separating the ammonium cation from the aqueous solution, leaving the hydroxycarboxylic acid in aqueous solution. The converting and separating steps may be accomplished by employing a hydrophobic acid or an acid ion exchange resin, each of which must have an acid dissociation constant, i.e., pK, at least 0.5 less that that of the salt of the hydroxycarboxylic acid. Where a hydrophobic acid is used, it must be immiscible in water, and its salt must also be immiscible in water, and the resulting multi-phase solution comprises an aqueous phase comprising the corresponding hydroxycarboxylic acid, as well as a non-aqueous phase comprising a neutralized acid. Alternatively, where the ion exchange resin is used, the aqueous solution of the ammonium salt of a hydroxycarboxylic acid is contacted with the resin, thereby converting the salt to a hydroxycarboxylic acid and capturing the ammonium cations on the resin. In either case, the aqueous solution is treated, such as by heating, to separate and recover the hydroxycarboxylic acid. The non-aqueous phase or resin is treated to separate and recover ammonia useful for preparing additional ammonium salt of a hydroxycarboxylic acid.

Process for converting a hydroxycarboxylic acid, or salts thereof, to an unsaturated carboxylic acid and/or its esters

An improved process for the production of unsaturated carboxylic acids and unsaturated nitrites from their corresponding Cto Calkanes, or mixtures of Cto Calkanes and alkenes, that involves a multi-stage reaction system which employs both separation of the oxidation product from one or more intermediate effluent streams, as well as feeding additional oxygen to reaction zones subsequent to the first reaction zone.

Process for the selective (amm)oxidation of lower molecular weight alkanes and alkenes

A mixed metal oxide, which may be an orthorhombic phase material, is regenerated, selectively enriched or selectively poisoned as a catalyst to reduce catalyst aging for the production of unsaturated carboxylic acids, or unsaturated nitrites, from alkanes, or mixtures of alkanes and alkenes, by contacting said mixed metal oxide with a an oxidizing gas such as oxygen, air, steam and combinations thereof is permitted to flow through the catalyst in a regenerator at a temperature of from 300&#xb0; C. to 600&#xb0; C. to form said regenerated catalyst.

Regeneration of mixed metal oxide catalysts

A process for oxidizing a hydrocarbon, which comprises subjecting the hydrocarbon to a liquid phase catalytic oxidation reaction in the presence of at least one oxidation catalyst to form an oxidized product.

Liquid-phase (AMM)oxidation process

A method for producing an unsaturated carboxylic acid comprises: (a) contacting, in a reaction zone, an alkane with a catalyst containing a mixed metal oxide, under conditions which produce a product gas comprising the unsaturated carboxylic acid, unreacted alkane and a product alkene; (b) recovering unreacted alkane and product alkene from the product gas; and (c) recycling the recovered unreacted alkane and product alkene to the reaction zone; wherein the mixed metal oxide consists of a material having the formulaAMNXOwherein A is at least one element selected from the group consisting of molybdenum and tungsten, wherein M is at least one element selected from the group consisting of vanadium, cerium and chromium, wherein N is at least one element selected from the group consisting of tellurium, bismuth and selenium, wherein X is at least one element selected from the group consisting of niobium, tantalum, titanium, aluminum, zirconium, chromium, manganese, iron, ruthenium, cobalt, rhodium, nickel, platinum, bismuth, boron, indium, arsenic, germanium, tin, lithium, sodium, potassium, rubidium, cesium, francium, beryllium, magnesium, calcium, strontium, barium, hafnium, lead, phosphorus, promethium, europium, gadolinium, dysprosium, holmium, erbium, thulium, ytterbium, lutetium, gold, silver, palladium, gallium, zinc, praseodymium, rhenium, iridium, neodymium, yttrium, samarium and terbium, wherein 0.25 &#x3c;a&#x3c;0.98, 0.003&#x3c;m&#x3c;0.5, 0.003&#x3c;n&#x3c;0.5, 0.003&#x3c;x&#x3c;0.5 and o is dependent on the oxidation state of the other elements. An analogous method for the preparation of unsaturated nitrites is also disclosed.

Recycle process

Improved processes for the preparation of olefins, unsaturated carboxylic acids and unsaturated nitriles involve the use of dehydrogenation catalysts suitable for the conversion of alkanes to alkenes and catalysts suitable for the conversion of alkanes and/or alkenes to unsaturated carboxylic acids or unsaturated nitriles.

Processes for the preparation of olefins, unsaturated carboxylic acids and unsaturated nitriles from alkanes

Improved processes for the preparation of olefins, unsaturated carboxylic acids and unsaturated nitrites involve the use of dehydrogenation catalysts suitable for the conversion of alkanes to alkenes and catalysts suitable for the conversion of alkanes and/or alkenes to unsaturated carboxylic acids or unsaturated nitrites.

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Ivyland, PA, United States of America

Donald Lee Zolotorofe